Tell the leader that I don't have 48 hours of nucleic acid.

Tell the leader that I don't have 48 hours to tell the truth. Because telling the leader that there is no nucleic acid for 48 hours is equivalent to reporting the situation and needs to be truthfully explained. You can tell the leader that you forgot to do the nucleic acid for personal reasons or other circumstances, and let the leader know your situation. Nucleic acid is a general term for deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). It is a biomacromolecule compound polymerized from many nucleotide monomers, and it is one of the most basic substances in life.